Yes this will work for Wordpress. You will need to go into Theme Editor to add a link to the js and CSS files.

If you do not have access to your own server, so need to include the js and css in the template itself, you will have to change one line of the js code to stop it pointing to a seperate css file. Change the line

l.setAttribute(”href”,”bt.css”);

to:

l.setAttribute(”href”,”self”);

You will have to set a title attribute to the links you wish to have bubble tips on.
Hope this helps. Please let me know if you need more instruction.